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MAX5977A Dataheets PDF



Part Number MAX5977A
Manufacturers Maxim Integrated Products
Logo Maxim Integrated Products
Description 1V to 16V / Single-Channel Hot-Swap Controllers
Datasheet MAX5977A DatasheetMAX5977A Datasheet (PDF)

19-5553; Rev 1; 1/11 TION KIT EVALUA BLE A IL A V A 1V to 16V, Single-Channel, Hot-Swap Controllers with Precision Current-Sensing Output General Description The MAX5977A/MAX5977B hot-swap controllers provide complete protection for systems with a 1V to 16V singlesupply voltage. During the initial insertion, the hot-swap controllers limit the inrush current from damaging the board or from shorting out the backplane. When the input voltage is above the undervoltage threshold and below the overv.

  MAX5977A   MAX5977A



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19-5553; Rev 1; 1/11 TION KIT EVALUA BLE A IL A V A 1V to 16V, Single-Channel, Hot-Swap Controllers with Precision Current-Sensing Output General Description The MAX5977A/MAX5977B hot-swap controllers provide complete protection for systems with a 1V to 16V singlesupply voltage. During the initial insertion, the hot-swap controllers limit the inrush current from damaging the board or from shorting out the backplane. When the input voltage is above the undervoltage threshold and below the overvoltage threshold, a 5FA current source powered from the internal 5V charge pump drives the gate of an external n-channel MOSFET, providing a slow turn-on response. An internal current-sense amplifier in the IC monitors the current across an external shunt resistor, providing current sensing for wide input-sense voltage range. The devices provide two levels of overcurrent circuit-breaker protections: a fast-trip threshold for a fast turn-off and a lower slow-trip threshold for a delayed turn-off. Exceeding either of the overcurrent circuit-breaker thresholds forces the device into fault mode where the external n-channel MOSFET is disabled. The MAX5977 is available in two versions that provide a latched-off (MAX5977A) or autoretry (MAX5977B) output when the device is in fault mode. A calibration mode allows further calibration of the integrated transconductance amplifier for production testing of the final design. The devices are offered in a 20-pin, 4mm x 4mm, TQFN-EP package and are fully specified from -40NC to +85NC. VariableSpeed/BiLevel is a trademark of Maxim Integrated Products, Inc. Features S 1% Accurate Current-Sense Amplifier Output S Hot-Swap Monitors Operation from 1V to 16V S Integrated Charge Pump Fully Enhances the External n-Channel FET (VGATE = VIN + 5V) S VariableSpeed/BiLevelK Fault Protection Provides Electronic Circuit-Breaker Function S Output Latched Off After Fault Condition (MAX5977A) S Autoretry After Fault Condition (MAX5977B) S Power-Good Indicator S Calibration Mode S Small, 20-Pin, 4mm x 4mm TQFN-EP Package MAX5977A/MAX5977B Applications Servers Storage Systems Network Switches and Routers General Hot-Swap Ordering Information PART MAX5977AETP+ MAX5977BETP+ PIN-PACKAGE 20 TQFN-EP* 20 TQFN-EP* FAULT RESPONSE Latched Autoretry Note: All devices are specified over the -40NC to +85NC operating temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. Typical Operating Circuit VIN 1V TO 16V RSCOMP RCAL SCOMP CALSENSE FCOMP IN SENSE GATE SOURCE CSOUT CURRENT-SENSE AMPLIFIER OUTPUT RCSOUT CALIBRATION MODE INPUT 2.7V TO 16V PWR FAULT AGND GND PG FAULT OUTPUT POWER-GOOD OUTPUT CAL RFCOMP RSENSE TO LOAD RGATE CGATE CL www.DataSheet4U.com MAX5977A MAX5977B +3.3V ________________________________________________________________ Maxim Integrated Products   1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1V to 16V, Single-Channel, Hot-Swap Controllers with Precision Current-Sensing Output MAX5977A/MAX5977B ABSOLUTE MAXIMUM RATINGS PWR, SENSE, IN, FCOMP, SCOMP, GATE, SOURCE, CALSENSE to GND. ...................-0.3V to +28V PG, CAL, BIAS, UV, OV, FAULT, CSOUT to GND. ..-0.3V to +6V REG to GND.............................................................-0.3V to +4V GATE to SOURCE....................................................-0.3V to +6V IN to FCOMP, IN to SCOMP, IN to SENSE, IN to CALSENSE...................................................-0.3V to +1V GND to AGND.......................................................-0.3V to +0.3V FAULT, PG Current............................................ -1mA to +50mA GATE, SOURCE, GND Current.........................................750mA Input/Output Current (all other pins)...................................20mA Continuous Power Dissipation (TA = +70NC) 20-Pin TQFN, Single-Layer Board (derate 16.9mW/NC above +70NC)..........................1355.9mW 20-Pin TQFN, Multilayer Board (derate 25.6mW/NC above +70NC)..........................2051.3mW Junction-to-Ambient Thermal Resistance (Note 1) BJA, Single-Layer Board............................................ +59NC/W BJA, Multilayer Board................................................. +39NC/W Junction-to-Case Thermal Resistance (Note 1) BJC, Single-Layer and Multilayer Board...................... +6NC/W Operating Temperature Range........................... -40NC to +85NC Junction Temperature......................................................+150NC Storage Temperature Range. ............................ -65NC to +150NC Lead Temperature (soldering, 10s).................................+300NC Soldering Temperature (reflow).......................................+260NC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer .


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